ABSTRACT STUDY QUESTION What is the optimal endometrial preparation protocol for a
frozen embryo transfer (FET)? SUMMARY ANSWER Although the optimal endometrial …

Despite the worldwide increase in frozen embryo transfer, the search for the best protocol to
prime endometrium continues. Well-designed trials comparing various frozen embryo …

BACKGROUND Frozen–thawed embryo transfer (FET) enables surplus embryos derived
from IVF or IVF-ICSI treatment to be stored and transferred at a later date. In recent years the …

STUDY QUESTION Are live birth rates (LBRs) after artificial cycle frozen-thawed embryo
transfer (AC-FET) non-inferior to LBRs after modified natural cycle frozen-thawed embryo …

Over the last decade the use of frozen–thawed embryo transfer has substantially increased,
and currently up to one in two embryos transferred has been cryopreserved. To support …

BACKGROUND Spontaneous ovulation during a natural menstrual cycle is frequently used
for timing frozen embryo transfer (FET). Nevertheless, it remains unclear whether or not …

Over the past decade, the application of frozen-thawed embryo transfer treatment cycles has
increased substantially. Hormone replacement therapy and the natural cycle are two …

Abstract STUDY QUESTION Are progesterone (P) levels on the day before natural cycle
frozen embryo transfer (NC-FET) associated with live birth rate (LBR)? SUMMARY ANSWER …

Progesterone is the main hormone in the luteal phase. It plays a key role in preparing the
uterus for a possible pregnancy, and in maintaining it after it has occurred. In assisted …

STUDY QUESTION Can ovarian stimulation with low dose hMG improve the implantation
rate (IR) per frozen–thawed embryo transferred (FET) when compared with natural cycle in …